I seriously doubt that the high end audio cable market was sufficient to design manufacturing of silver cables.
Teflon dielectric is required for mil specs where high heat resistance is required. Copper reacts with teflon, though. Silver doesn't. Therefore silver coated copper or pure silver...
Why not just use a laptop? I was looking at an Asus on sale at Costco for $499, which allows you to reverse the display so that you could set the motherboard side flat on your stand and have the touch screen display standing up for use.
Look in your classified ads for the best Martin Logan speakers within your budget. People tend to take good care of them and since they are tall they tend to go cheap. They actually take up very little floor space but again are tall, and the bigger ones don't need a subwoofer. Just make sure...